MainActivity.kt

class MainActivity : AppCompatActivity() {

    var hasAnimated = false

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }

    override fun onTouchEvent(event: MotionEvent?): Boolean {
        if (event?.action != MotionEvent.ACTION_DOWN) return super.onTouchEvent(event)
        
        val set = ConstraintSet()
        set.clone(constraint_layout)

        if (!hasAnimated) {
            set.setGuidelinePercent(R.id.guideline, 0.2f)
        } else {
            set.setGuidelinePercent(R.id.guideline, 0.5f)
        }

        TransitionManager.beginDelayedTransition(constraint_layout)
        set.applyTo(constraint_layout)

        hasAnimated = !hasAnimated
        return true
    }
}